1000121201010 has 48 divisors (see below), whose sum is σ = 2670593918616. Its totient is φ = 259490905344.

The previous prime is 1000121200997. The next prime is 1000121201041. The reversal of 1000121201010 is 101021210001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 710917099281 + 289204101729 = 843159^2 + 537777^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1000121200983 and 1000121201001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150165019 + ... + 150171678.

Almost surely, 2^{1000121201010} is an apocalyptic number.

1000121201010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000121201010 is an abundant number, since it is smaller than the sum of its proper divisors (1670472717606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000121201010 is a wasteful number, since it uses less digits than its factorization.

1000121201010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300336747 (or 300336744 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1000121201010 its reverse (101021210001), we get a palindrome (1101142411011).

The spelling of 1000121201010 in words is "one trillion, one hundred twenty-one million, two hundred one thousand, ten".